Air cleaner for vacuum brakes



Sept. 12, 1939. I UPPERT 2,172,710

AIR CLEANER FOR VACUUM BRAKES Filed June 14, 1938 A tiomeys Patented Sept. 12, 1939 UNITED STATES PATENT OFFICE Alfred Lippert, Banks, 0reg., assignor of one-half to Edward A. Deaville, Banks, Oreg.

Application June 14, 1938, SerialNo. 213,706

1 Claim.

This invention relates to an air cleaner for vacuum brakes, the general object of the invention being to cause the air passing from the brakes to the motor to pass through fluid which cleans the same and thus prevents the dust and dirt in the air from injuring the parts of the motor.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a vertical sectional view through the device.

Figure 2 is a section on the line 2--2 of Figure 1.

In this drawing the letter A indicates a tank which is formed of a top section I and the lower section 3, the two sections being detachably connected together as shown generally at 3'. A cross bar 4 extends across the lower end of the section I and supports a small tank or chamber 5 into the top of which the pipe 6 leading from the brakes enters. Of course, this pipe passes through the section I and inner and outer nuts I are placed on the pipe to hold the same firmly in engagement with the wall part of the section I. This small tank or chamber 5 is provided with a removable bottom 8 which has an internally threaded bushing 9 depending therefrom for receiving the upper threaded end of a tubular part I I) carried by the cover part II of a small casing I2 in the section 3. This casing I2 is formed with the perforations I3 in its bottom and the perforations I4 in the lower part of its side wall and these perforations are covered by wire mesh I 5 located in the casing. The tubular member II! extends to a point slightly spaced from the bottom of the casing I2 as shown. A non-splash plate I6 of arcuate shape is supported from the bottom 8 of the tank and extends over the upper end of the tubular member ID toprevent any oil entering the tank from splashing and thus reaching the pipe 6. Oil or the like is introduced into the section 3 through the filling pipe I! the upper end of which is closed by a plug I8. A coupling I 9 is located in the upper end of the section I and is to be connected by a conduit with the motor of the braking system. 'I'hiscoupling contains a valve 20.

Thus when the motor is in operation it will produce a vacuum in the upper portion of the tank A above the oil therein, or other fluid, and

this vacuum will draw air from the brakes through the pipe 6 into the tank 5 and from this tank the air will pass under the plate I6 into the tubular member II] to escape through the lower end of the tubular member into the casing I2 which is filled or partly filled with the oil placed in the lower section 3. The air will bubble through the oil and the perforations I3 and I4 with the mesh I5 will divide the air stream into minute particles so that the oil or other fluid will come into thorough contact with the air and thus clean the same from all dust and dirt. The air will then pass into the section II and pass to the motor through the coupling 19 and the conduit.

The valve 20 will keep a constant vacuum in the tank A to prevent the: oil or" other fluid from flowing back into the hoses leading to the brakes, in case the motor is stalled with the brakes on. Chamber 5 provides a reservoir for the oil or other fluid in case of pressure occurring in the tank A, for any reason. This tank or chamber 5 will, therefore, keep oil from going into the hoses if such pressure should occur in the tank A.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claim.

Having described the invention, what is claimed as new is:

An air cleaner of the class described comprising a large tank having an outlet at its upper end, means for introducing liquid into the lower part of the tank, a small tank in the large tank and supported above the liquid level of the large tank, said small tank being spaced from the side walls and the top of the large tank, an inlet pipe passing through a side wall of the large tank and in communication with the top of the small tank, said small tank having an opening in its bottom, a tubular member having its upper end inserted in the said opening, a casing supported from the tubular member and having its bottom spaced from the bottom of the large tank, said casing having perforations in its bottom and in the lower portions of its side walls and said casing being immersed in the liquid, the tubular member extending to a point in the casing slightly spaced from the bottom thereof and an arcuate-shaped plate extending over the upper end of the tubular member to prevent liquid entering the small tank from the tubular member from reaching the inlet pipe.

ALFRED LIPPERT. 

